A "staggering array" of human rights abuses has been committed by Islamic State (IS) militants and associated armed groups over a nine-week period in Iraq, the UN says.
It says that abuses committed between 6 July to 10 September may amount to war crimes or crimes against humanity.
It also accuses Iraqi security forces and their associates of violations.
Turkish MPs are to meanwhile vote on a motion on military action against Islamic State.
Jihadist militants are said to have reached within a few kilometres of Kobane, a Syrian Kurdish town, sending tens of thousands of refugees into Turkey.
While Turkey's parliament is expected to approve some form of military intervention, it has lingering concerns about IS retaliation and about aiding the Kurds. Turkey has fought a long civil war with its Kurdish minority.